Thresher-concave.



v No.'896,097. PATBNTED AUG. 18,1908.

M. FLYNN.

THRESHER CONCAVE.

APPLICATION I'ILED SEPT.23,1907.

ZSHEETS-SHBET 1.

BIII

- ::nm I

M. FLYNN.

THRESHER GONCAVE.

APPLIOATION Hmm snr''. 23. 1907.

BBEEETS-SEEET 2.

MICHAEL FLYNN, OF SUPERIOR, WISCONSIN.

THRESHER-CONCAVE.

No. s96,o97.

Specificaton of Letters Patent.

Patented Aug. 18, 1908.

Application filed September 23, 1907. Serial No. 394306.

To aZZ whom it may concerns Be it known that I, MICHAEL FLYNN, a citizenof the United States, residing at Superior, in the county of Douglas andState of Wisconsin, have invented a new and useful Thresher-Concave, ofwhich the following is a specification.

This invention has relation to a concave for threshing machines and itconsists in the novel Construction and arrangement of its parts ashereinafter shown and described.

The obj ect of the invention is to provide a concave for threshingmachines which is made up of a series of sections which are adapted tobe adjusted and shifted with relation to each other so as to beadvantageously arranged to meet conditions to which they are subjected.

The concave consists of side bearers which are adapted to be secured tothe opposite sides of the thresher, and which are provided with groovesadapted to support the sections of which the concave is made up.Rotatable blocks are journaled in the bearers and have shanks whichproject through the sides of the thresher. Said blocks are provided upontheir inner faces with grooves that register in alinement with thegrooves of the bearers. The grooves in the said blocks are adapted toreceive lugs located at the ends of the intermediate concave sections,thus, affording means whereby the said intermediate concave sections maybe turned aXially. The shanks of the said blocks are non-circular andpass through elongated openings in the sides of the thresher and throughopenings provided in side plates mounted upon the eXterior of thethresher. Said plates may be adjusted so that the said shanks may bemoved longitudinally along the openings in the side of the thresher sothat the cylinder concave may be moved toward or away from the threshingcylinder. Means is provided in combination with' one of the side platesfor looking the intermediate concave sections in their adjustedpositions. The concave sections are of such construction as willhereinafter appear.

In the acconipanying drawingsz-Figure l is a sectional view of thethresher concave. Fig. 2 is a top plan view of the same. Fig. 3 is aside elevation of one of the bearers of the concave. Fig. 4 is a sideelevation of one of the side plates showing a portion of the thresherside with an elongated openin therein. Fig. 5 is a transverse sectionalview of a portion of the thresher side and one of the bearers and asectional view of a portion of one of the intermediate concave sections.Fig. 6 is a sectional view of a portion of one of the intermediatecancave sections of diierent construction from that shown in Fig. 5.Fig. 7 is a horizontal sectional view of a portion of the concavesection shown in Fig. 6 illustrating the manner of securing the teeththerein. Fig. 8 is a perspective View of a tooth used in the form of theconcave section illustrated in Figs. 6 and 7 and Fig. 9 is a plan viewof the lower edge of a riser used on the concave section as shown inFig. 5.

The thresher concave consists of the side bearers 1, 1, each of which isprovided with a curved groove 2. The concave proper is made up of aseries of sections which are supported at their ends by the bearers 1.As the said sections diiier slightly in Construction and operation theyare designated as 3, 4, 5 and 6 in order that they may be properlydistinguished from each other throughout the description. The blocks 7are substantially circular and are provided upon their inner faces withgrooves S`which are adapted to register in alinement with the grooves 2.Each said block is provided with a shank 9 which passes through anelongated opening 10 provided in the thresher side 11. The plates 12 aremounted upon the eXterior of the thresher side 11 and the said shanks 9pass through the said plates. The plates may be moved laterally andSecured in their adjusted position by means of set screws 13 or othersecurng devices, whereby the concave sections may be moved toward oraway from the thresher cylinder (not shown). The shanks of the blocks 7which are located at one side of the thresher are non-circular as at 14and the collars 15 are located upon the said non-circular portions 14and are adapted to lide thereon but are held against movementongitudinally of the non-circular portions 194 by means of pins 16 whichpass transversel y through the said portions. The outer face of theplate 12 is provided with star-shaped recesses 17, which are adapted toreceive the enlarged squared portions 18 of the collars 15. Each of theconcaved sections 3, 4, 5 and 6 is provided at its opposite ends withlugs 19. The said lugs are adapted to slip longitudinally through thegrooves 2 of the bearers 1 and the grooved edge of the blocks 7. Whenthe section 6 is trated, in Figs. 6, 7 and 8, the said sections inposition between the bearers its lugs are at the ends of the grooves 2when the blocks 20 are inserted in the said grooves and secured thereinby set screws 21, thus, the concaved section 6 is fixed with relation tothe bearers 1. The concaved section 5 is then placed in position betweenthe bearers 1 by sliding its lugs 19 through the grooves 2 until theyenter the grooves 8 of the blocks 7 adjacent the blocks 20. The blocks22 are then inserted laterally in the grooves 2 and are Secured thereinby means of set screws 23. The lugs of the concaved sections 4 are thenslipped along the grooves 2 until they enter the grooves 8 of the blocks7 at the opposite end of the blocks 22. The blocks 24 are then placedlaterally in the grooves 2 and are secured therein by means of setscrews 25. The lu s 19 of the concave sections 3 are then slippe alongthe grooves 2 until they come in contact with the end of the block 24.The board 27 is then inserted in the groove 28 provided in the bearers 1and the parts of the thresher concave are assembled.

It will thus be seen that the ends of the concave sections 4 and 5 aresupported by rotatable blocks and that the said sections may be turnedaxially into a great variety of positions or combination of positionsinto which the said sections may be turned in order to advantageouslyperform their functions when subjected to unusual or peculiar conditionsof the grain being threshed. It will also be observed that the concavesections 3 and 6 are held in fixed positions between the bearers. As thesections 3 and 5 are of the same Construction a description of one willanswer for both. The said sections differ only in the manner in whichthey are mounted between the bearers. As illusare provided with thetransversely disposed grates 29 with the transversely disposed teeth 30located at intervals between them. Special provision is made formounting the teeth 30 in the said sections. The recesses 31 (see Fig. 7)are cut at the opposite sides of the opening for the reception of thetooth 30 and the said recesses 31 are provided at one end with theinclined walls 32. In the opposite walls of the recesses notches 33 areprovided and are adapted to receive the lugs 34 formed at one side ofthe shank of the tooth 30. The opposite side of the shank of the tooth30 is provided with ribs 35 and the cuneate blocks 36 are adapted to bedriven between the shank of the tooth 30 and the ribs 35 thereof and theinclined side 32 of the recesses 31 for the purpose of holding the tooth30 in position and forcing the lugs 34 into the notches 33. Thus thetooth is firmly held upon the concave section in parallel relation withthe grate portions thereof.

As will be seen from Fig. 2, the teeth as above described are arrangedin two rows lengthwise of the sections but either one of the rows ofteeth may, if desired, be removed from the sections and shanks withoutteeth may be inserted so as to increase the grate area of the sections,if desired, oghgsection 3 y be pn el iit utliegrqgv of b'a'i ef aiidturned pp sd down and replaced between the bearers wheniti tire surfaceWill be ak n p y.asafa teefi of ttlitdiitwrd the thresh g ig cylinder.The position of the concave sectioir be reversed by turning the blocks 7which support the same. The concave section 4 is provided with thegrates 37 and the risers 38 located at intervals between said grates.The grates 37 are transversely disposed with relation to the section 4and at their ends are located grate sections 39 which are disposedlongitudinally along the section 4. The risers 38 are curved along theirupper edgcs as at 40 and are provided with the rear edges 41. The lowerportions of the risers\ 38 are provided with grooves 42 which areadapted to receive shoulders 43 formed in the upper surface of theconcave section 4. A 90 shown in Fig. 9, (which is a bottom plan view ofone of the risers) the forward end of the riser is of greater breadththan the rear end thereof. Consequently the said riser is forced moresecurely in place upon the section 4 as the thresher cylinder rotates asthe strain is first eXerted against the broader end of the riser. Thesaid risers gradually dilninish in thickness toward their upper edges.The function that the risers perform is to lift the butt end of grainpassing through the g thresher so that the grain falling from the headsof subsequent bundles may have a chance to fall through the gratesections 37 or 39 into the grain pan of the thresher (not shown). Theobject of disposing the grate sections 37 and 39 at a right angle toeach other is to facilitate the passage of the grain through theconcave, for the grain that will roll down the grate sections 37 intransverse relation thereto, will enter and pass through the gratesection 39 in longitudinal relation thereto.

The concave section 6 is similar in construction to the concave section4, with the exception that the transversely disposed grate sections 37are not so numerous and that the spaces between the grate bars are ofgreater area. This is owing to the fact that the section 4 is downwardlyinclined with relation to the course taken by the grain and straw whilethe section 6 is upwardly inclined. Therefore greater space is providedbetween the grate bars of the concave section 6 to catch the loosenedgrain remaining in the straw without detaining the chafi as the chaff;being lighter than the grain, will follow the straw up the incline,while the grain will fall by gravity through the spaces between the saidgrate bars.

It will be observed that the concaved section 4 may be turned upsidedown when its upper surface will be converted into a grate area only.Also, the concave section 6 may be reversed in its position in thegrooves of the bearers should more grate area be desired at the pointoccupied by the said section. It will also be observed that any one orseveral of the teeth and the risers 38 may be removed from the concavewithout necessitating that the parts of the concave be taken apart toremove the teeth 30 as the wedges 36 may be kno cked out of positionwhen the said teeth may be readily taken from the concave section. Toremove any one of the risers 38 the particular riser is struck upon itsrear edge 41 with a hammer or other implement and the said riser isforced from between the shoulder 43 of the concave sections.

Having described my invention what I claim as new and desire to secureby Letters- Patent is 1. A concave for threshing machines comprisingbearers, concave sections supported thereby, blocks rotatably mounted insaid bearers and having grooves for the recepton of end portions of theconcave section, said blocks having shanks which pass transverselythrough the frame of the thresher and plates located upon the exteriorof the thresher and in which the said shanks are journaled.

2. A concave for threshing machines comrising bearers having grooves androtatable locks journaled theren with grooved faces adapted to registerin alinement with the grooves of the bearers and concave sections havingat their ends flanges adapted to enter the grooves of the bearers andthe grooves of the blocks.

3. A concave for threshing machines comprising bearers having grooves,blocks journaled for rotation in said bearers and having grooved facesadapted to register in alinement with the grooves of the bearers,concave sections having fianges at their ends adapted to pass throughthe grooves of the bearers and the grooves in the blocks and blocksinserted in the grooves of the bearers between the fianges of theadjacent concave sections.

4. A concave for threshing machines comprising bearers, concavedsections mounted therein, some of the said sections being supported byrotatable blocks having shanks, a perforated plate receiving said shanksand aving star-shaped recesses upon its outer "face, said shanks beingnon-circular, sleeves slidably mounted upon the shanks and havingenlarged portions adapted to enter the recesses of the plate and meansfor holding the enlarged portions of the sleeves in the recesses of theplates.

5. In a concave for threshing machines, bearers, concave sectionssupported thereby and having grate openings, some of -the sectionshaving straw risers and other sections having threshing teeth withshanks seated in recesses and having lateral lugs dis osed in notchesand ribs with cuneate bloc s inserted between the walls of the recessesthe side of the shanks and the said ribs.

6. A concave for threshing machines comprising bearers, concave sectionssupported thereby, some of which are provided with threshing teeth andthe others having transverse grooves provided at their edges withshoulders, straw risers having recesses in their sides adapted toreceive the shoulders of the groove, said risers being of greaterbreadth at one than the other end and gradually diminishing in thicknesstoward their upper edges.

ln testimony that I claim the foregoing as my own, I have hereto afiixedmy signature in the presence of two witnesses.

MICHAEL FLYNN. Witnesses:

' A. R. COLE,

H. FORSLUND.

